User's Manual

ADCP-75-132 • Issue 2C • August 2006

Page 33

4. Set the DHU aside and then drill appropriately sized holes in the mounting surface for

the fasteners.

5. Partially install the fasteners in the drilled holes. Leave the head of each fastener

protruding about 1/4 inch (6 mm) from the mounting surface.

6. Hang the DHU from the fasteners and then securely tighten each fastener.

4.6 Chassis Ground Connections

A stud is provided on the front side of the chassis for connecting a grounding wire to the

chassis. Use the following procedure to connect the grounding wire to the chassis and to route

the grounding wire to an approved earth ground source:

1. Obtain a length of #18 AWG (1.00 mm) insulated stranded copper wire for use as a

chassis grounding wire.

2. Terminate one end of the wire with a ring terminal.

3. Locate the chassis ground stud at the front of the DHU as shown in Figure 17.

17279-A

Figure 17. Chassis Ground Stud

4. Secure the ring end of the wire to the chassis ground stud (see Figure 17) using the nut

and two star washers provided.

5. Route the free end of the chassis grounding wire to an approved (per local code or

practice) earth ground source.

6. Cut the chassis grounding wire to length and connect it to the approved ground source as

required by local code or practice.

Note: Be sure to maintain reliable grounding for rack and wall mounted equipment. Pay

particular attention to ground source connections.